/*
 * Copyright 2017-2020 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.cloud.services.query.rest;

import static org.activiti.cloud.services.query.model.QServiceTaskEntity.serviceTaskEntity;
import static org.activiti.cloud.services.query.rest.RestDocConstants.PREDICATE_DESC;
import static org.activiti.cloud.services.query.rest.RestDocConstants.PREDICATE_EXAMPLE;

import com.querydsl.core.types.Predicate;
import io.swagger.v3.oas.annotations.Parameter;
import org.activiti.cloud.alfresco.data.domain.AlfrescoPagedModelAssembler;
import org.activiti.cloud.api.process.model.CloudServiceTask;
import org.activiti.cloud.services.query.app.repository.ServiceTaskRepository;
import org.activiti.cloud.services.query.model.ServiceTaskEntity;
import org.activiti.cloud.services.query.rest.assembler.ServiceTaskRepresentationModelAssembler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.querydsl.binding.QuerydslPredicate;
import org.springframework.hateoas.EntityModel;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.PagedModel;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(
    value = "/admin/v1/process-instances/{processInstanceId}",
    produces = { MediaTypes.HAL_JSON_VALUE, MediaType.APPLICATION_JSON_VALUE }
)
public class ProcessInstanceServiceTasksAdminController {

    private final ServiceTaskRepresentationModelAssembler taskRepresentationModelAssembler;

    private final AlfrescoPagedModelAssembler<ServiceTaskEntity> pagedCollectionModelAssembler;

    private final ServiceTaskRepository taskRepository;

    @Autowired
    public ProcessInstanceServiceTasksAdminController(
        ServiceTaskRepository taskRepository,
        ServiceTaskRepresentationModelAssembler taskRepresentationModelAssembler,
        AlfrescoPagedModelAssembler<ServiceTaskEntity> pagedCollectionModelAssembler
    ) {
        this.taskRepository = taskRepository;
        this.taskRepresentationModelAssembler = taskRepresentationModelAssembler;
        this.pagedCollectionModelAssembler = pagedCollectionModelAssembler;
    }

    @RequestMapping(value = "/service-tasks", method = RequestMethod.GET)
    public PagedModel<EntityModel<CloudServiceTask>> getServiceTasks(
        @PathVariable String processInstanceId,
        @Parameter(description = PREDICATE_DESC, example = PREDICATE_EXAMPLE) @QuerydslPredicate(
            root = ServiceTaskEntity.class
        ) Predicate predicate,
        Pageable pageable
    ) {
        Predicate filter = serviceTaskEntity.processInstanceId.eq(processInstanceId).and(predicate);

        Page<ServiceTaskEntity> page = taskRepository.findAll(filter, pageable);
        return pagedCollectionModelAssembler.toModel(pageable, page, taskRepresentationModelAssembler);
    }
}
